package com.springboot.demo.common.utils;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Shape;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.util.Hashtable;

import javax.imageio.ImageIO;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

public class QRCodeUtils {
	
	private static BufferedImage createImage(String content, InputStream logoin,
            boolean needCompress) throws Exception {
        Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
        hints.put(EncodeHintType.CHARACTER_SET, Constants.QRCODE_CHARSET);
        hints.put(EncodeHintType.MARGIN, 1);
        BitMatrix bitMatrix = new MultiFormatWriter().encode(content,
                BarcodeFormat.QR_CODE, Constants.QRCODE_SIZE, Constants.QRCODE_SIZE, hints);
        int width = bitMatrix.getWidth();
        int height = bitMatrix.getHeight();
        BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
        for (int x = 0; x < width; x++) {
            for (int y = 0; y < height; y++) {
                image.setRGB(x, y, bitMatrix.get(x, y) ? 0xFF000000
                        : 0xFFFFFFFF);
            }
        }
        // 插入图片
        QRCodeUtils.insertImage(image, logoin, needCompress);
        return image;
    }
    /**
     * 插入LOGO
     *
     * @param source
     *            二维码图片
     * @param imgPath
     *            LOGO图片地址
     * @param needCompress
     *            是否压缩
     * @throws Exception
     */
    public static void insertImage(BufferedImage source, InputStream qrinstream,
            boolean needCompress) throws Exception {
//        if (!file.exists()) {
//            System.err.println(""+imgPath+"   该文件不存在！");
//            return;
//        }
        Image src = ImageIO.read(qrinstream);
        int width = src.getWidth(null);
        int height = src.getHeight(null);
        if (needCompress) { // 压缩LOGO
            if (width > Constants.QRCODE_LOGO_WIDTH) {
                width = Constants.QRCODE_LOGO_WIDTH;
            }
            if (height > Constants.QRCODE_LOGO_HEIGHT) {
                height = Constants.QRCODE_LOGO_HEIGHT;
            }
            Image image = src.getScaledInstance(width, height,
                    Image.SCALE_SMOOTH);
            BufferedImage tag = new BufferedImage(width, height,
                    BufferedImage.TYPE_INT_RGB);
            Graphics g = tag.getGraphics();
            g.drawImage(image, 0, 0, null); // 绘制缩小后的图
            g.dispose();
            src = image;
        }
        // 插入LOGO
        Graphics2D graph = source.createGraphics();
        int x = (Constants.QRCODE_SIZE - width) / 2;
        int y = (Constants.QRCODE_SIZE - height) / 2;
        graph.drawImage(src, x, y, width, height, null);
        Shape shape = new RoundRectangle2D.Float(x, y, width, width, 6, 6);
        graph.setStroke(new BasicStroke(3f));
        graph.draw(shape);
        graph.dispose();
    }
    public static void insertQrcodeToBg(BufferedImage source, InputStream qrinstream, int x, int y, int width,int height, boolean needCompress) throws Exception {
        Image src = ImageIO.read(qrinstream);
//        int width = src.getWidth(null);
//        int height = src.getHeight(null);
        if (needCompress) { // 压缩LOGO
//            if (width > Constants.QRCODE_HD_WIDTH) {
//                width = Constants.QRCODE_HD_WIDTH;
//            }
//            if (height > Constants.QRCODE_HD_HEIGHT) {
//                height = Constants.QRCODE_HD_HEIGHT;
//            }
            Image image = src.getScaledInstance(width, height,
                    Image.SCALE_SMOOTH);
            BufferedImage tag = new BufferedImage(width, height,
                    BufferedImage.TYPE_INT_RGB);
            Graphics g = tag.getGraphics();
            g.drawImage(image, 0, 0, null); // 绘制缩小后的图
            g.dispose();
            src = image;
        }
        // 插入LOGO
        Graphics2D graph = source.createGraphics();
        graph.drawImage(src, x, y, width, height, null);
        Shape shape = new RoundRectangle2D.Float(x, y, width, width, 6, 6);
        graph.setStroke(new BasicStroke(3f));
        graph.draw(shape);
        graph.dispose();
    }
    @SuppressWarnings("unused")
    public static void insertFontToBg(BufferedImage source,String text, int x, int y, int width,int height, boolean needCompress) throws Exception {
//        Image src = ImageIO.read(qrinstream);
//        int width = src.getWidth(null);
//        int height = src.getHeight(null);
//        if (needCompress) { // 压缩LOGO
////            if (width > Constants.QRCODE_HD_WIDTH) {
////                width = Constants.QRCODE_HD_WIDTH;
////            }
////            if (height > Constants.QRCODE_HD_HEIGHT) {
////                height = Constants.QRCODE_HD_HEIGHT;
////            }
//            Image image = src.getScaledInstance(width, height,
//                    Image.SCALE_SMOOTH);
//            BufferedImage tag = new BufferedImage(width, height,
//                    BufferedImage.TYPE_INT_RGB);
//            Graphics g = tag.getGraphics();
//            g.drawImage(image, 0, 0, null); // 绘制缩小后的图
//            g.dispose();
//            src = image;
//        }
        // 插入LOGO
        Graphics2D graph = source.createGraphics();
//        graph.drawImage(src, x, y, width, height, null);
//        Shape shape = new RoundRectangle2D.Float(x, y, width, width, 6, 6);
//        graph.setStroke(new BasicStroke(3f));
//        graph.draw(shape);
//        graph.dispose();
        graph.fillRect(0, 0, width, height);
        Font font = new Font("STZHONGS", Font.PLAIN, 72);
        graph.setFont(font);
        graph.setColor(Color.BLACK);
        FontMetrics fm = graph.getFontMetrics(font);
        java.awt.geom.Rectangle2D rect = fm.getStringBounds(text, graph);
        int textWidth = (int) (rect.getWidth());
        int textHeight = (int) (rect.getHeight());
//        int x = (width - textWidth) / 2;
//        int y = (height - textHeight) / 2 + fm.getAscent();
        graph.drawString(text, x, y);
        graph.dispose();
    }
    /**
     * 生成二维码(内嵌LOGO)
     *
     * @param content
     *            内容
     * @param imgPath
     *            LOGO地址
     * @param destPath
     *            存放目录
     * @param needCompress
     *            是否压缩LOGO
     * @throws Exception
     */
    public static BufferedImage encode(String content, InputStream in,
            boolean needCompress) throws Exception {
        return QRCodeUtils.createImage(content, in, needCompress);
    }
    /**
     * 生成二维码(内嵌LOGO)
     *
     * @param content
     *            内容
     * @param imgPath
     *            LOGO地址
     * @param destPath
     *            存储地址
     * @throws Exception
     */
    public static BufferedImage encode(String content, InputStream in)
            throws Exception {
        return QRCodeUtils.encode(content, in, false);
    }
    /**
     * 生成二维码
     *
     * @param content
     *            内容
     * @param destPath
     *            存储地址
     * @param needCompress
     *            是否压缩LOGO
     * @throws Exception
     */
    public static BufferedImage encode(String content, boolean needCompress) throws Exception {
        return QRCodeUtils.encode(content, null, needCompress);
    }
    /**
     * 生成二维码
     *
     * @param content
     *            内容
     * @param destPath
     *            存储地址
     * @throws Exception
     */
    public static BufferedImage encode(String content) throws Exception {
        return QRCodeUtils.encode(content, null, false);
    }
    /**
     * BufferedImage转换至byte[]格式
     * @param bufImg
     * @return
     * @throws Exception
     */
    public static byte[] buf2byte(BufferedImage bufImg) throws Exception
    {
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        ImageIO.write(bufImg, Constants.QRCODE_FORMAT_NAME, out);
        byte[] b = out.toByteArray();
        out.close();
        return b;
    }
    public static void main(String[] args) throws Exception {
//        String text = "http://www.y1da.com/oauth?p=mypg";;
//        QiNiuUtils.uploadPublic(buf2byte(QRCodeUtil.encode(text, "E:/projects/eht-y1da/eht-y1da-wechat/src/main/resources/logo.jpg", true)), false);
//        QRCodeUtil.encode(text, "E:/projects/eht-y1da/eht-y1da-wechat/src/main/resources/logo.jpg", true);
    }
}
